<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        class Father{
            constructor() {

            }
            money() {
                console.log(100);
            }
        }
        class Son extends Father{
            constructor() {

            }
        }
        var son = new Son();
        son.money();
        
    </script>
</body>
</html>